100 lines
3.6 KiB
Python
100 lines
3.6 KiB
Python
""":module: watchdog.utils.patterns
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:synopsis: Common wildcard searching/filtering functionality for files.
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:author: boris.staletic@gmail.com (Boris Staletic)
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:author: yesudeep@gmail.com (Yesudeep Mangalapilly)
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:author: contact@tiger-222.fr (Mickaël Schoentgen)
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"""
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from __future__ import annotations
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# Non-pure path objects are only allowed on their respective OS's.
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# Thus, these utilities require "pure" path objects that don't access the filesystem.
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# Since pathlib doesn't have a `case_sensitive` parameter, we have to approximate it
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# by converting input paths to `PureWindowsPath` and `PurePosixPath` where:
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# - `PureWindowsPath` is always case-insensitive.
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# - `PurePosixPath` is always case-sensitive.
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# Reference: https://docs.python.org/3/library/pathlib.html#pathlib.PurePath.match
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from pathlib import PurePosixPath, PureWindowsPath
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from collections.abc import Iterator
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def _match_path(
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raw_path: str,
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included_patterns: set[str],
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excluded_patterns: set[str],
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*,
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case_sensitive: bool,
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) -> bool:
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"""Internal function same as :func:`match_path` but does not check arguments."""
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path: PurePosixPath | PureWindowsPath
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if case_sensitive:
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path = PurePosixPath(raw_path)
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else:
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included_patterns = {pattern.lower() for pattern in included_patterns}
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excluded_patterns = {pattern.lower() for pattern in excluded_patterns}
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path = PureWindowsPath(raw_path)
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common_patterns = included_patterns & excluded_patterns
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if common_patterns:
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error = f"conflicting patterns `{common_patterns}` included and excluded"
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raise ValueError(error)
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return any(path.match(p) for p in included_patterns) and not any(path.match(p) for p in excluded_patterns)
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def filter_paths(
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paths: list[str],
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*,
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included_patterns: list[str] | None = None,
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excluded_patterns: list[str] | None = None,
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case_sensitive: bool = True,
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) -> Iterator[str]:
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"""Filters from a set of paths based on acceptable patterns and
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ignorable patterns.
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:param paths:
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A list of path names that will be filtered based on matching and
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ignored patterns.
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:param included_patterns:
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Allow filenames matching wildcard patterns specified in this list.
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If no pattern list is specified, ["*"] is used as the default pattern,
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which matches all files.
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:param excluded_patterns:
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Ignores filenames matching wildcard patterns specified in this list.
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If no pattern list is specified, no files are ignored.
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:param case_sensitive:
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``True`` if matching should be case-sensitive; ``False`` otherwise.
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:returns:
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A list of pathnames that matched the allowable patterns and passed
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through the ignored patterns.
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"""
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included = set(["*"] if included_patterns is None else included_patterns)
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excluded = set([] if excluded_patterns is None else excluded_patterns)
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for path in paths:
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if _match_path(path, included, excluded, case_sensitive=case_sensitive):
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yield path
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def match_any_paths(
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paths: list[str],
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*,
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included_patterns: list[str] | None = None,
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excluded_patterns: list[str] | None = None,
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case_sensitive: bool = True,
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) -> bool:
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"""Matches from a set of paths based on acceptable patterns and
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ignorable patterns.
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See ``filter_paths()`` for signature details.
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"""
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return any(
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filter_paths(
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paths,
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included_patterns=included_patterns,
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excluded_patterns=excluded_patterns,
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case_sensitive=case_sensitive,
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),
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)
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